The 13-year-old will often hoover when he’s invited over for tea so he can diagnose and fix any issues with the machines.

He’s also become an internet hit for his honest reviews of new vacuums which he shares on his social media channels.

For his 13th birthday Matthew even went to the Numatic factory in Somerset, coming home with two incredibly rare Henry Hoovers to add to his collection which he keeps in a workshop at the bottom of the garden.

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Matthew, who aspires to being the next James Dyson, first discovered he had a knack for fixing them while at his friend’s grandma’s house when he fixed her broken Henry which she was about to throw out.

Matthew, from Maghull, Merseyside, said: ‘From when I was young I had always been into vacuum cleaners and got a toy Henry when I was two.

The schoolboy has amassed a collection of 150 vacuum cleaners (Picture: Mercury)

‘I started fixing them when I was about 10. It started after I’d gone to a friend’s house and his grandma said she was going to throw out her Henry because it was broken.

‘I stripped it down and cleaned it and it worked. She was so made up with it as it was good as new.

‘I remember in year four or five having a rough idea how to take them apart and looking into how to make them run, that’s when the collecting started.

Despite Matthew’s dad Richard being an engineer, Matthew has never needed his help and insists he’s taught himself how to fix them using YouTube and speaking to other repairers.

He spends around 10 hours a week working on them – fitting it in around his homework.

Entrepreneur Matthew reckons he’s made thousands of pounds after starting his business when he finished primary school having fixed around 500 and sold 300 machines – including to cleaning companies in the northwest and even his schoolteachers.

Once he’s fixed them up and sold them he reinvests the cash into another five machines.

Matthew added: ‘I just find it so satisfying getting them from places like builder’s yards where they’re full of plaster – being able to clean them up, make them look nice and get them up to a really good standard.

‘I can get a broken machine for about £5, fix it and sell it on for £50.

Matthew Lock’s devotion to vacuums started from the age of two when he got his first toy Henry (Picture: Mercury)

‘To test it I’ll put down dirt, old food or oats to see how the vacuum performs picking up bits and pieces.

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‘I’m a perfectionist – I wouldn’t sell a machine if I didn’t feel like it would last.’

Matthew’s customer base, who he said are stunned when they realise how young he is, started to grow through word of mouth and after he received positive reviews on selling sites.

Matthew said his inspirations are James Dyson and Chris Duncan – who invented the Henry hoover.

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He said: ‘I want to emulate them and design and build my own vacuum. I would love to visit the James Dyson Foundation and study engineering at the Dyson institute of Engineering and Technology.’

Matthew’s parents teaching assistant Christine, 50, and engineer Richard, 52, said they couldn’t be prouder of their son.

Christine said: ‘Initially I thought it was a passing phase but then we would go to somebody else’s house and they would have a different hoover and he would be really interested in seeing how it worked.

‘We were quite surprised and amazed really. Friends of mine would ask him to have a look at their hoovers and I would think “oh God” but then he would actually repair them.’